Note: They have rigid, entire leaves with one edge turned
toward the zenith. Most of them secreteresinous gums,
whence they called {gum trees}, and their timber is of
great value. {Eucalyptus Globulus} is the blue gum; {E.
gigantea}, the stringy bark: {E. amygdalina}, the
peppermint tree. {E. Gunnii}, the Tasmanian cider tree,
yields a refreshing drink from wounds made in the bark
in the spring. Other species yield oils, tars, acids,
dyes and tans. It is said that miasmaticvalleys in
Algeria and Portugal, and a part of the unhealthy Roman
Campagna, have been made more salubrious by planting
groves of these trees.
[1913 Webster]